Hydrogen Gas Detector

Model

KD-12A

KD-12B

KD-12C

Detection Principle

Hot wire
semiconductor

Catalytic
combustion

Thermal
conductivity

Gas Detected

Combustible gas, Toxic gas

Hydrogen, Helium,
Carbon dioxide

Sampling Method

Diffusion

Detection Range

As per specifications

Alarm Set Value

As per specifications

Alarm Accuracy

Combustible gas: 25% of alarm set value
Toxic gas: 30% of alarm set value

Alarm Delay

Combustible gas: within 30s at 1.6 times of alarm set value
Toxic gas: within 60s at 1.6 times of alarm set value

Alarms

Gas alarm: Red LED lamp flashes
Trouble alarm: Yellow LED lamp flashes (sensor trouble, power voltagemalfunction, etc.)

Display

4-digit digital LED display

Output

Gas concentration analog signal
4-20mADC (common to the negative side of power supply)
Gas alarm contact (one stage only)^*1
1a no-voltage contact output, Non-latching
Rated load: 0.5A at 250VAC or 0.5A at 30VDC (resistance load)

Operation

At 4 points of magnetic switches

Approvals

Ex d IIC T5 (TIIS)

II 2 G Ex db IIC T5 Gb (ATEX)

Ex db IIC T5 Gb (IECEx)

Degree of Protection

IP65

CE marked

Complied with CE Directive 2004/108/EC

Applicable Cable

Cable out diameter: 10-13mm
5-conductor cable^*1: CVV-S 1.25mm²3-conductor cable: CVV-S 2mm² or 1.25mm²

Operating
Temperature/Humidity^*2

-10 to +50 C
10 to 90 %RH (0 to 50 C)

Power Supply

24 VDC (20%)

Power Consumption

3W max.

Dimensions

W158 x H116 x D68 mm (excluding protrusion)

Weight

Approx. 1.2kg